ID | Technique | Tactic |
---|---|---|
T1110.003 | Password Spraying | Credential Access |
T1078 | Valid Accounts | Defense Evasion |
T1078.001 | Default Accounts | Initial Access |
Detection: Multiple Okta Users With Invalid Credentials From The Same IP
DEPRECATED DETECTION
This detection has been marked as deprecated by the Splunk Threat Research team. This means that it will no longer be maintained or supported. If you have any questions or concerns, please reach out to us at research@splunk.com.
Description
DEPRECATION NOTE - This search has been deprecated and replaced with Okta Multiple Users Failing To Authenticate From Ip
. This analytic identifies multiple failed logon attempts from a single IP in a short period of time. Use this analytic to identify patterns of suspicious logins from a single source and filter as needed or use this to drive tuning for higher fidelity analytics.
Search
1`okta` eventType=user.session.start outcome.result=FAILURE
2| rename client.geographicalContext.country as country, client.geographicalContext.state as state, client.geographicalContext.city as city
3| stats min(_time) as firstTime max(_time) as lastTime dc(src_user) as distinct_users values(src_user) as users by src_ip, displayMessage, outcome.reason, country, state, city
4| `security_content_ctime(firstTime)`
5| `security_content_ctime(lastTime)`
6| search distinct_users > 5
7| `multiple_okta_users_with_invalid_credentials_from_the_same_ip_filter`
Data Source
No data sources specified for this detection.
Macros Used
Name | Value |
---|---|
okta | eventtype=okta_log OR sourcetype = "OktaIM2:log" |
multiple_okta_users_with_invalid_credentials_from_the_same_ip_filter | search * |
multiple_okta_users_with_invalid_credentials_from_the_same_ip_filter
is an empty macro by default. It allows the user to filter out any results (false positives) without editing the SPL.
Annotations
Default Configuration
This detection is configured by default in Splunk Enterprise Security to run with the following settings:
Setting | Value |
---|---|
Disabled | true |
Cron Schedule | 0 * * * * |
Earliest Time | -70m@m |
Latest Time | -10m@m |
Schedule Window | auto |
Creates Notable | Yes |
Rule Title | %name% |
Rule Description | %description% |
Notable Event Fields | user, dest |
Creates Risk Event | True |
Implementation
This search is specific to Okta and requires Okta logs are being ingested in your Splunk deployment.
Known False Positives
A single public IP address servicing multiple legitmate users may trigger this search. In addition, the threshold of 5 distinct users may be too low for your needs. You may modify the included filter macro multiple_okta_users_with_invalid_credentials_from_the_same_ip_filter
to raise the threshold or except specific IP adresses from triggering this search.
Associated Analytic Story
Risk Based Analytics (RBA)
Risk Message | Risk Score | Impact | Confidence |
---|---|---|---|
Multple user accounts have failed to authenticate from a single IP. | 9 | 30 | 30 |
References
Detection Testing
Test Type | Status | Dataset | Source | Sourcetype |
---|---|---|---|---|
Validation | Not Applicable | N/A | N/A | N/A |
Unit | ✅ Passing | Dataset | Okta |
OktaIM2:log |
Integration | ✅ Passing | Dataset | Okta |
OktaIM2:log |
Replay any dataset to Splunk Enterprise by using our replay.py
tool or the UI.
Alternatively you can replay a dataset into a Splunk Attack Range
Source: GitHub | Version: 4